Rock channeler



Nov. 8, 1927.

w. H. w'nqawnml ROCK CHANNELER Filed July 15. 1925 @Harney Patented Nov. 8, 1927.

, massa STATES- PATENT .oari'cfs.

WAD HL WINEMAN, OF MTCHIGAN CITY, INEI-ANR, ASSIGNOR T0 S'LESVANMACITL ERY COMPANY, A CGRPORATIGN MASSAGHSETTSi i nocx er1-Anuman..

nppiicanonnled any 15, 1925.V serial. nnuaire.;

"My kinvention:` relates` to? apparatusvfor channeling roclr,` more especially for use in to: breachV the solid` portion; or` partition ofi theA nochk between the holes to form*` a` coni tinuous` channel. The breaching operation is substantially the samey as thei drilling op eration, with a. breaching', tool'y substituted forthe usual drill bit in the drilling:- niachinei. i

Among; the objects of the present inven@ tion is: tor provide` improved means. for performing a: breaching operation. Another.

object olfV my invention: is to provideW an iin-- proved breaching tool= or drift.k Still` an:

other object'of. my invention is to providek an' improved relatively inexpensive and rugged breaching toolV for cutting` out thef partitions between' a senie'siof closely'spaced` drill] holes: thus forming a channel. These and-other objects will',` however, hereinafter more fully appear.

More specifically, my invention is comprised of a breaching `tool or drift having ashank portion adapted to be inserted within a rock drilling impact tool in place of the usual drill bit and has formed thereon at its forward end a cylindrical body portion adapted to be guided in one of the drill holes during the breaching operation. Thek body portion has formed therein an angularly disposed slot or recess within which a detachable cutting element is adapted to be inserted. A transversely disposed pin is provided for holding the cutting element in operative position. However, if desired this cutting elem-ent may be formed integral with the cylindrical body portion.

In the accompanying drawings I have shown for purposes of illustration one form which my invention may assume in practice.

In these drawingsrf. y

Fig. l is an elevational view, partially broken away in section, of an impact drill-y ing machine with which my improved f breaching tool or drift is incorporated.

Iiig. is. a: front. elevation of` improved breaching tool..

yFig isa transversesectional View taken substantially online' 3- 3 .off Fig. 2.

Fig lll is an sideelevation partiallyin sec.

tion of'v the breaching tool` shown in F ig. 2,

the same being shown in` operativeI lposition in a.v4 drill holes 4 Fig,Y 5` is a.d`1agra1ninatic. plan view indicatingthe drill holesfprior to the breaching operation. p p i i Fig. 6 is a diagrammatic plan viewillus# tratingxy the drilliholes subsequent to the broachingoperation, y p' f In@ the illustrative embodiment of my invention I. have shownga standard drillingy machine, generally designated 1, of the well known impact,` type havingv reciprocable therein a usual hammer pistonv 2) As shown, the ferwardend.. of the drilling machine is providedv with. chuck housing 3 within n which a usual chuclrd is disposed and adaptedto-` supportv the shank 5ofy my improved breaching. tool or drift 6`. in ,operative positien.` Aus-ualI retainer? is provided adapted. to` cooperate. with acollar 8 formed on the: breaching-tool for preventing excessive movement of? the latter; y y

"Iheimprfoved-4 breaching tool*k 6 does comprise a cylindrical body portion 9 having formed therein and extending partially therethrough an angularly disposed recess or slot 10 within which a detachable cutting element 1l is adapted to be inserted. As shown, the cutting element 11 is provided with an inclined bottom cutting surface l2 and upwardly inclined converging side walls 13, the latter formingclearance for the cutting surface. Formed in the body of the cutting element 11 is an opening 14 through which passes a transversely disposed `pin 15, whichy is preferably easily removable and locks the cutting element in position within the slot 10. Instead of making the cutting element removable, the same may be forged integral with the guiding portion 9 if desired.

In the use of my improved. breaching tool it will herein be noted that a series of alined closely s aced holes A are drilled'in thc rock as c early shown in Fig. 5. After the drilling Aoperation has been completed the usual rock drill bit is withdrawn from the chuck 4 of the drilling machine 1 and my improved broaching tool substituted therefor. The operator then inserts the lower portion of the cylindrical body 9 vof the broaching tool in one of the drill holes A and the hammer piston 2 of the impact motor is t-hen suitably actuated, causing the same to strike a. series of impact blows on the shank 5 of the tool in a well known manner. This causes the inclined cutting edge 12 of the cutting element to break away the partition B between two adjacent` holes as the drilling machine is forced forwardly as clearly shown in Fig. t, the body portion 9 of the breaching tool beingV guided in the drill hole at that time. After the breaching operation is completed on the first hole the broaching tool is withdrawn and inserted in the next adjacent hole, this operation being repeated'until a continuous cut or channel is made, as indicated at C in Fig. 6, thus enabling the rock or stone to be split with facility and with accuracy.

IVhile I have in this application specifically described one form which my invention may assume in practice, it will be understood that this form of the same isshown for pur- -poses of illustration and that the invention may be modified and embodied in various other forms without departing from its spirit or the scope of the appended claims.

lfVhat I claim as new and desire to secure by Letters Patent is: Y

l. In a broaching tool ofthe impact type, a shank having an enlarged body portion forming a guide, said body portion being provided with an angularly disposed recess, a cutting element snugly fitting in said recess and having an upwardly inclined bottom cutting surface andvupwardly converging side walls, and removable means for retaining said lcutting element in said recess.

2. In` aI broaching tool of the impact type, a cylindrical body formed integral therewith and having an inclined recess opening on one side of said body, a detachable cutting element fitting in said recess, and retaining means for securing said element in said recess-comprising a pin extending transversely through said element and said body portion, said 'cutting element having an upwardly inclined cutting surface and side walls inclined upwardly toward one another to 'provide clearance for said cutting surface.

In a breaching tool of the impact type having a body portion forming'a guide, and a cutting element projecting laterally from said body portion and having an inclined bot# tom surface and converging side walls forming clearance for the cutting edges, said side walls being portions of vplanes forming a dihedral angle with each other whose edge is at an angle of more than forty-live degrees with the longitudinal line of the breaching tool, said bottoni surface being substantially perpendicular to said edge.

4. In a breaching tool of the impact type, a shank having a body portion forming a guide, and a cutting element Aprojecting laterally from said body portion and having an inclined bottom cutting surface and side walls converging upwardly and radially outwardly to form clearance for the cutting surface, said upward convergence being greater than said radial convergence, said cutting elementl having a substantially vertical surface defining its outer extremity.

In testimony whereof I affix my signature WADE H. IVINEMAN. 

